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- From: thompson@PAN.SSEC.HONEYWELL.COM ((jt) John Thompson)
- Newsgroups: comp.sys.apollo
- Subject: re: SCSI disks on 5500?
- Message-ID: <199208272118.AA18440@pan.ssec.honeywell.com>
- Date: 27 Aug 92 21:18:59 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: world
- Organization: The Internet
- Lines: 61
-
-
-
- > I've read the faq, but it doesn't make the answer to this question entirely
- > clear. Can I connect an external SCSI disk to a DN5500 with a WD7000
- > controller? If so, is there any limitation on the size (eg 1.2GB)? Is the
- > process for involing etc.. the same as for a 425t?
-
- OK -- let's make it clear then.
-
- You can not hook up any SCSI disk drives to a WD7000 controller. In fact, you
- can't use SCSI drives on any Apollo machine except the DN2500 (the 9000/4xx is
- an HP/Apollo box).
-
- You CAN hook up up to 2 ESDI drives to a WD7000 controller. There are only
- three (?) drives that are supported, though -- the Maxtor 8760E (697MB), the
- Maxtor 4380E (329MB FastActuator) and the Micropolis(?) 170MB drive. The
- controller can apparently figure out what's on the other end, and act
- appropriately, so there aren't jumpers for the drive type itself. I think I've
- heard that you can add different drive types as your two drives (e.g. a 697MB and
- a 329MB drive).
-
- You CAN install up to 2 WD7000 controllers in your system (DN3500/DN4500/DN5500).
- The SCSI bus _must_ be disabled on the second controller.
-
- You CAN install a SCSI cartridge drive or floppy, but only if you do not have a
- non-SCSI one in place. If you have a non-SCSI tape/floppy, you must disable the
- SCSI bus.
-
- If the SCSI bus is enabled, you CAN add up to 7 SCSI devices total of CD-ROMS,
- 4mm drives, 8mm drives, and 9-track drives. I'm not sure whether the 4mm drives
- are explicitly supported, but I'm almost certain that I read somewhere that they
- work. I've read that SCSI device 0 is reserved for the cartridge/floppy drive,
- but that might have changed.
-
- The 8mm tape drives must be SCSI ids 1,2,3, or 4. These correspond to devices
- rmts8, 9, 10, and 11 (12-14 for non-rewinding devices). Although wbak is not
- officially supported on 8mm drives, it works fine at 10.3+ (and at 10.2?). Use
- m0 for SCSI id 1, m1 for SCSI id 2, etc. There is a long pause before it starts
- writing the tape with wbak. The tar and omniback packages work just fine (as do
- lots of other vendors' backup packages, I'm sure).
-
-
- Clearer?
-
- -- jt --
- John Thompson
- Design Services Engineer / Sys-Admin
- Honeywell, SSEC
- Plymouth, MN 55441
- thompson@pan.ssec.honeywell.com
-
- What do I know? I'm just a Token Administrator.
- *************************************************************************
- * This e-mail correspondence is a work of fiction. Any similarity *
- * between the views presented and actual views, personal or corporate, *
- * living, dead, or still to be conceived, is pure coincidence. *
- *************************************************************************
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